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Creates a type-erased hashable value that wraps the given instance.

The following example creates two type-erased hashable values: x wraps an Int with the value 42, while y wraps a UInt8 with the same numeric value. Because the underlying types of x and y are different, the two variables do not compare as equal despite having equal underlying values.

let x = AnyHashable(Int(42))
let y = AnyHashable(UInt8(42))
 
print(x == y)
// Prints "false" because `Int` and `UInt8` are different types
 
print(x == AnyHashable(Int(42)))
// Prints "true"

base: A hashable value to wrap.

Declaration

The value wrapped by this instance.

The base property can be cast back to its original type using one of the casting operators (as?, as!, or as).

let anyMessage = AnyHashable("Hello world!")
if let unwrappedMessage = anyMessage.base as? String {
    print(unwrappedMessage)
}
// Prints "Hello world!"

Declaration

The custom mirror for this instance.

If this type has value semantics, the mirror should be unaffected by subsequent mutations of the instance.

Declaration

A textual representation of this instance, suitable for debugging.

Declaration

A textual representation of this instance.

Instead of accessing this property directly, convert an instance of any type to a string by using the String(describing:) initializer. For example:

struct Point: CustomStringConvertible {
    let x: Int, y: Int
 
    var description: String {
        return "(\(x), \(y))"
    }
}
 
let p = Point(x: 21, y: 30)
let s = String(describing: p)
print(s)
// Prints "(21, 30)"

The conversion of p to a string in the assignment to s uses the Point type's description property.

Declaration

The hash value.

Hash values are not guaranteed to be equal across different executions of your program. Do not save hash values to use during a future execution.

Declaration

Returns a Boolean value indicating whether two type-erased hashable instances wrap the same type and value.

Two instances of AnyHashable compare as equal if and only if the underlying types have the same conformance to the Equatable protocol and the underlying values compare as equal.

The following example creates two type-erased hashable values: x wraps an Int with the value 42, while y wraps a UInt8 with the same numeric value. Because the underlying types of x and y are different, the two variables do not compare as equal despite having equal underlying values.

let x = AnyHashable(Int(42))
let y = AnyHashable(UInt8(42))
 
print(x == y)
// Prints "false" because `Int` and `UInt8` are different types
 
print(x == AnyHashable(Int(42)))
// Prints "true"

Parameters: lhs: A type-erased hashable value. rhs: Another type-erased hashable value.

Declaration